http://blogs.technet.com/david_bennett/archive/2006/11/12/how-to-turn-on-debug-exceptions-with-wcf.aspxIt is possible to see exceptions passed back in the messages sent to the service. This makes it a lot easier to debug multi-peer applications. The way to do this is to add into the web.config file the section. You can see in the following config sectionen-USCommunityServer 2.1 SP1 (Build: 61025.2)